2221808732640 has 1920 divisors, whose sum is σ = 9863600947200. Its totient is φ = 469421568000.

The previous prime is 2221808732629. The next prime is 2221808732651. The reversal of 2221808732640 is 462378081222.

It is an interprime number because it is at equal distance from previous prime (2221808732629) and next prime (2221808732651).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 3169484290 + ... + 3169484990.

It is an arithmetic number, because the mean of its divisors is an integer number (5137292160).

Almost surely, 2^{2221808732640} is an apocalyptic number.

2221808732640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2221808732640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4931800473600).

2221808732640 is an abundant number, since it is smaller than the sum of its proper divisors (7641792214560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2221808732640 is a wasteful number, since it uses less digits than its factorization.

2221808732640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803 (or 772 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 45.

The spelling of 2221808732640 in words is "two trillion, two hundred twenty-one billion, eight hundred eight million, seven hundred thirty-two thousand, six hundred forty".